Android自定义视图位图大小超出VM预算

我正在制作一个自定义视图，它有两个元素：一个背景，由一个位图（如地图）和一个小资源图像（如图钉）组成，用于指示地图上的位置。在每个gps位置上更改“我的视图获取”的更新，并在新位置移动定位销

首先，它工作正常，过了一段时间，我出现了以下错误：

错误/AndroidRuntime（416）： java.lang.OutOfMemoryError:位图 规模超过虚拟机预算

我想这与一直在重新绘制地图有关。也许你有什么办法帮我

public class MyMapView extends View {

private int xPos = 0; 
private int yPos = 0;
private Bitmap trackMap;

private Paint backgroundPaint;
private Bitmap resizedBitmap;

private Bitmap position;
private Matrix positionMatrix;
private Paint positionPaint;
private int space=0;

public MyMapView(Context context) {
 super(context);
 init(context, null);
}

public MyMapView(Context context, AttributeSet attrs) {
 super(context, attrs);
 init(context, attrs);
}

public MyMapView(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 init(context, attrs);
}

private void init(final Context context, AttributeSet attrs) {
 backgroundPaint = new Paint();
 backgroundPaint.setFilterBitmap(true);

 position = BitmapFactory.decodeResource(getContext().getResources(), R.drawable.position);
 positionMatrix = new Matrix();

 positionPaint = new Paint();
 positionPaint.setFilterBitmap(true);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
}

@Override
protected void onDraw(Canvas canvas) {

 int width = getMeasuredWidth();
 int height = getMeasuredHeight();

  if (trackMap!=null)
  {

    resizedBitmap = Bitmap.createScaledBitmap(trackMap, height, height, true);



    space = (width - resizedBitmap.getWidth())/2;
    canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaint);
   }


     if (xPos != 0 && yPos !=0)
     {
      canvas.save(Canvas.MATRIX_SAVE_FLAG);

      canvas.translate(xPos+space-position.getWidth()/2, yPos-position.getHeight()/2);
      canvas.drawBitmap(position, positionMatrix, positionPaint);

      canvas.restore();
     }

}

 public void updatePosition(int xpos, int ypos, Bitmap trackImage)
 {
  xPos=xpos;
  yPos=ypos;
  trackMap = trackImage;
  invalidate();
 }
}

@费多：我试过这样的方法：

if (trackMap!=null)
  {
   if (resizedBitmap != null) {
    resizedBitmap.recycle();
     }


    resizedBitmap = Bitmap.createScaledBitmap(trackMap, height, height, true);



    space = (width - resizedBitmap.getWidth())/2;
    canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaint);
   }

  }

@Override
protected void onDraw(Canvas canvas) {

     int width = getMeasuredWidth();
     int height = getMeasuredHeight();

     if (trackMapRef != null) {

         Bitmap resizedBitmap = Bitmap.createScaledBitmap(trackMapRef.get(), width, height, true);


         space = (width - resizedBitmap.getWidth()) / 2;
         canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaintRef.get());
     }


     if (xPos != 0 && yPos != 0) {
         canvas.save(Canvas.MATRIX_SAVE_FLAG);

         positionRef = new WeakReference<Bitmap>(BitmapFactory.decodeResource(getContext().getResources(), R.drawable.position));
         positionMatrixRef = new WeakReference<Matrix>(new Matrix());
         Paint posPaint = new Paint();
         posPaint.setFilterBitmap(true);
         positionPaintRef = new WeakReference<Paint>(posPaint);

         canvas.translate(xPos + space - positionRef.get().getWidth() / 2, yPos - positionRef.get().getHeight() / 2);
         canvas.drawBitmap(positionRef.get(), positionMatrixRef.get(), positionPaintRef.get());

         canvas.restore();
     }

}

但还是一样。每次GPS检测到位置改变时，我都从活动中调用updatePosition（..），因此经常调用onDraw get。图像贴图为400x400像素

11-13 20:29:42.121: ERROR/AndroidRuntime(213): Uncaught handler: thread main exiting due to uncaught exception
11-13 20:29:42.150: ERROR/AndroidRuntime(213): java.lang.OutOfMemoryError: bitmap size exceeds VM budget
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.graphics.Bitmap.nativeCreate(Native Method)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.graphics.Bitmap.createBitmap(Bitmap.java:468)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.graphics.Bitmap.createBitmap(Bitmap.java:435)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:340)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at com.vorienteering.customcontrols.MyMapView.onDraw(MyMapView.java:71)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.View.draw(View.java:6274)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.drawChild(ViewGroup.java:1526)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1256)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.drawChild(ViewGroup.java:1524)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1256)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.View.draw(View.java:6277)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.drawChild(ViewGroup.java:1526)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1256)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.View.draw(View.java:6277)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.drawChild(ViewGroup.java:1526)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1256)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.drawChild(ViewGroup.java:1524)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1256)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.View.draw(View.java:6277)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1883)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewRoot.draw(ViewRoot.java:1332)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1097)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1613)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.os.Looper.loop(Looper.java:123)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at android.app.ActivityThread.main(ActivityThread.java:4203)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at java.lang.reflect.Method.invokeNative(Native Method)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at java.lang.reflect.Method.invoke(Method.java:521)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
11-13 20:29:42.150: ERROR/AndroidRuntime(213):     at dalvik.system.NativeStart.main(Native Method)

@Peter Knego我在你的回答中编辑过。它在找到positionRef和其他一些方面存在问题。我更新了如下代码：

if (trackMap!=null)
  {
   if (resizedBitmap != null) {
    resizedBitmap.recycle();
     }


    resizedBitmap = Bitmap.createScaledBitmap(trackMap, height, height, true);



    space = (width - resizedBitmap.getWidth())/2;
    canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaint);
   }

  }

@Override
protected void onDraw(Canvas canvas) {

     int width = getMeasuredWidth();
     int height = getMeasuredHeight();

     if (trackMapRef != null) {

         Bitmap resizedBitmap = Bitmap.createScaledBitmap(trackMapRef.get(), width, height, true);


         space = (width - resizedBitmap.getWidth()) / 2;
         canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaintRef.get());
     }


     if (xPos != 0 && yPos != 0) {
         canvas.save(Canvas.MATRIX_SAVE_FLAG);

         positionRef = new WeakReference<Bitmap>(BitmapFactory.decodeResource(getContext().getResources(), R.drawable.position));
         positionMatrixRef = new WeakReference<Matrix>(new Matrix());
         Paint posPaint = new Paint();
         posPaint.setFilterBitmap(true);
         positionPaintRef = new WeakReference<Paint>(posPaint);

         canvas.translate(xPos + space - positionRef.get().getWidth() / 2, yPos - positionRef.get().getHeight() / 2);
         canvas.drawBitmap(positionRef.get(), positionMatrixRef.get(), positionPaintRef.get());

         canvas.restore();
     }

}

@覆盖
受保护的void onDraw（画布）{
int width=getMeasuredWidth（）；
int height=getMeasuredHeight（）；
if（trackMapRef！=null）{
Bitmap resizedBitmap=Bitmap.createScaledBitmap（trackMapRef.get（），宽度，高度，true）；
空格=（width-resizedBitmap.getWidth（））/2；
drawBitmap（resizedBitmap，空格，0，backgroundPaintRef.get（））；
}
如果（xPos！=0&&yPos！=0）{
canvas.save（canvas.MATRIX\u save\u标志）；
positionRef=新的WeakReference（BitmapFactory.decodeResource（getContext（）.getResources（），R.drawable.position））；
positionMatrixRef=新的WeakReference（新矩阵（））；
Paint posPaint=新油漆（）；
posPaint.setFilterBitmap（true）；
positionPaintRef=新WeakReference（posPaint）；
translate（xPos+space-positionRef.get（）.getWidth（）/2，yPos-positionRef.get（）.getHeight（）/2）；
drawBitmap（positionRef.get（），positionMatrixRef.get（），positionPaintRef.get（））；
canvas.restore（）；
}
}

现在它的工作时间稍微长一点。加倍时间。但仍然会出现内存不足错误。 非常感谢你的帮助

正如Fedor提到的，我在想，有没有一种方法可以让我只在创建时绘制地图图像，然后只在绘制时更新pin位置？这似乎是更方便的方法，因为重新绘制地图只使用资源，而且一直都是一样的

---

谢谢大家的帮助。这是唯一阻止我完成项目的事情。

你在泄漏内存。您是否尝试过调整BitMap.recycle（）的大小

---

还有为什么你总是重画地图？也许你可以将地图作为静态图像，只重新绘制pin？

你正在泄漏内存。您是否尝试过调整BitMap.recycle（）的大小

---

还有为什么你总是重画地图？也许您可以将贴图作为静态图像，并仅重新绘制pin？

避免保留对

可绘制对象的引用（位图）-删除位图类型的类字段

阅读如何阅读

编辑：

试试这个：

public class MyMapView extends View {

    private int xPos = 0;
    private int yPos = 0;
    private WeakReference<Bitmap> trackMapRef;

    private WeakReference<Paint> backgroundPaintRef;

    private WeakReference<Bitmap> positionRef;
    private WeakReference<Matrix> positionMatrixRef;
    private WeakReference<Paint> positionPaintRef;
    private int space = 0;

    public MyMapView(Context context) {
        super(context);
        init(context, null);
    }

    public MyMapView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public MyMapView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context, attrs);
    }

    private void init(final Context context, AttributeSet attrs) {
        Paint paint = new Paint();
        paint.setFilterBitmap(true);
        backgroundPaintRef = new WeakReference<Paint>(paint);

        positionRef = new WeakReference<Bitmap>(BitmapFactory.decodeResource(getContext().getResources(), R.drawable.position));
        positionMatrixRef = new WeakReference<Matrix>(new Matrix());

        Paint posPaint = new Paint();
        posPaint.setFilterBitmap(true);
        positionPaintRef = new WeakReference<Paint>(posPaint);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
    }

    @Override
    protected void onDraw(Canvas canvas) {

        int width = getMeasuredWidth();
        int height = getMeasuredHeight();

        if (trackMapRef != null) {

            Bitmap resizedBitmap = Bitmap.createScaledBitmap(trackMapRef.get(), width, height, true);


            space = (width - resizedBitmap.getWidth()) / 2;
            canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaintRef.get());
        }


        if (xPos != 0 && yPos != 0) {
            canvas.save(Canvas.MATRIX_SAVE_FLAG);

            canvas.translate(xPos + space - positionRef.get().getWidth() / 2, yPos - positionRef.get().getHeight() / 2);
            canvas.drawBitmap(positionRef.get(), positionMatrixRef.get(), positionPaintRef.get());

            canvas.restore();
        }

    }

    public void updatePosition(int xpos, int ypos, Bitmap trackImage) {
        xPos = xpos;
        yPos = ypos;
        trackMapRef = new WeakReference<Bitmap>(trackImage);
        invalidate();
    }
}

公共类MyMapView扩展视图{
私有int xPos=0；
私有int yPos=0；
私有WeakReference trackMapRef；
私人WeakReference backgroundPaintRef；
私有WeakReference positionRef；
私有WeakReference位置矩阵外部参照；
私人weakreferef；
私有int空间=0；
公共MyMapView（上下文）{
超级（上下文）；
init（上下文，null）；
}
公共MyMapView（上下文、属性集属性）{
超级（上下文，attrs）；
init（上下文，attrs）；
}
公共MyMapView（上下文、属性集属性、int-defStyle）{
超级（上下文、属性、定义样式）；
init（上下文，attrs）；
}
私有void init（最终上下文，AttributeSet attrs）{
油漆=新油漆（）；
paint.setFilterBitmap（真）；
backgroundPaintRef=新WeakReference（油漆）；
positionRef=新的WeakReference（BitmapFactory.decodeResource（getContext（）.getResources（），R.drawable.position））；
positionMatrixRef=新的WeakReference（新矩阵（））；
Paint posPaint=新油漆（）；
posPaint.setFilterBitmap（true）；
positionPaintRef=新WeakReference（posPaint）；
}
@凌驾
测量时的保护空隙（内部宽度测量等级、内部高度测量等级）{
设置测量尺寸（测量等级getSize（宽度测量等级），测量等级getSize（高度测量等级））；
}
@凌驾
受保护的void onDraw（画布）{
int width=getMeasuredWidth（）；
int height=getMeasuredHeight（）；
if（trackMapRef！=null）{
Bitmap resizedBitmap=Bitmap.createScaledBitmap（trackMapRef.get（），宽度，高度，true）；
空格=（width-resizedBitmap.getWidth（））/2；
drawBitmap（resizedBitmap，空格，0，backgroundPaintRef.get（））；
}
如果（xPos！=0&&yPos！=0）{
canvas.save（canvas.MATRIX\u save\u标志）；
translate（xPos+space-positionRef.get（）.getWidth（）/2，yPos-positionRef.get（）.getHeight（）/2）；
drawBitmap（positionRef.get（），positionMatrixRef.get（），positionPaintRef.get（））；
canvas.restore（）；
}
}
公共void更新位置（int xpos、int ypos、位图trackImage）{
xPos=xPos；
yPos=yPos；
trackMapRef=新的WeakReference（trackImage）；
使无效（）；
}
}
避免保留对
可绘制文件的引用（位图）-删除位图类型的类字段

阅读如何阅读

编辑：

试试这个：

public class MyMapView extends View {

    private int xPos = 0;
    private int yPos = 0;
    private WeakReference<Bitmap> trackMapRef;

    private WeakReference<Paint> backgroundPaintRef;

    private WeakReference<Bitmap> positionRef;
    private WeakReference<Matrix> positionMatrixRef;
    private WeakReference<Paint> positionPaintRef;
    private int space = 0;

    public MyMapView(Context context) {
        super(context);
        init(context, null);
    }

    public MyMapView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    public MyMapView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init(context, attrs);
    }

    private void init(final Context context, AttributeSet attrs) {
        Paint paint = new Paint();
        paint.setFilterBitmap(true);
        backgroundPaintRef = new WeakReference<Paint>(paint);

        positionRef = new WeakReference<Bitmap>(BitmapFactory.decodeResource(getContext().getResources(), R.drawable.position));
        positionMatrixRef = new WeakReference<Matrix>(new Matrix());

        Paint posPaint = new Paint();
        posPaint.setFilterBitmap(true);
        positionPaintRef = new WeakReference<Paint>(posPaint);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
    }

    @Override
    protected void onDraw(Canvas canvas) {

        int width = getMeasuredWidth();
        int height = getMeasuredHeight();

        if (trackMapRef != null) {

            Bitmap resizedBitmap = Bitmap.createScaledBitmap(trackMapRef.get(), width, height, true);


            space = (width - resizedBitmap.getWidth()) / 2;
            canvas.drawBitmap(resizedBitmap, space, 0, backgroundPaintRef.get());
        }


        if (xPos != 0 && yPos != 0) {
            canvas.save(Canvas.MATRIX_SAVE_FLAG);

            canvas.translate(xPos + space - positionRef.get().getWidth() / 2, yPos - positionRef.get().getHeight() / 2);
            canvas.drawBitmap(positionRef.get(), positionMatrixRef.get(), positionPaintRef.get());

            canvas.restore();
        }

    }

    public void updatePosition(int xpos, int ypos, Bitmap trackImage) {
        xPos = xpos;
        yPos = ypos;
        trackMapRef = new WeakReference<Bitmap>(trackImage);
        invalidate();
    }
}

公共类MyMapView扩展视图{
私有int xPos=0；
私有int yPos=0；
私有WeakReference trackMapRef；
私人WeakReference backgroundPaintRef；
私有WeakReference positionRef；
私有WeakReference位置矩阵外部参照；
私人weakreferef；
私有int空间=0；
公共MyMapV